Amos call



(No Model.) A CALL I WRENCH.

N0. 317,9Z4. Patented May 12, 1885.

V WITNESSES: INVENTOR ATTORNE airs 'ra'rns Rarsnr tries.

AMOS CALL, OF SPRINGFIELD, MASSACHUSETTS, ASSIGNOR TO THE BEMIS 86 CALLHARDWVARE AND TOOL COMPANY, OF SAME PLACE.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 317,924, dated May 12,1885.

' 9 Application filed October 13, 1884. N0 model.)

ToaZZ whom it may concern:

Be it known that I, AMos CALL, a citizen of the United States, residingat Springfield, in the county of Hampden and State of Massachusetts,have invented new and useful Improvements in Wrenches, of which thefollowing is a specification.

This invention relates to improvements in wrenches in which are embodiedin a single wrench devices adapted to serve as a monkeywrench, andothers possessing different characteristics and peculiarly calculated tomeet the requirements of a wrench for gripping and turning cylindricalobj cots-such as pipes and round rods-the object being to embrace in onetool or implement improved operating elements for serving theabove-named two purposes to the best advantage, but in which the devicesserving one purpose cannot by their action impair the efficiency of theothers.

In the drawings forming part of this specification, Figure 1 is a sideelevation of a wrench embodying my improvements. Fig. 2 isa like view ofa wrench ,showing a modified construc tion of Fig. 1. i

In the drawings, 22 is the bar of the wrench, having thereon the usualhandle, B, and the double jawed or branched head a, the said bar havinga screw-thread formed thereon on which the swivel-nut 2 turns forthepurpose of moving the jaw-slides on the bar, one of said slides having abook -like engagement with the nut D by means of a groove around thelatter near one end in the usual manner. One of the branches 6 of saidhead a constitutes a fixed monkey-wrench jaw having a plain face atright angles to the contiguous side of the bar b, and the oppositebranch, 0, of said head, to the under face of which is secured aserrated-faced gripping-dog, d, constitutes a fixedpipewrench jaw.

The improved wrench herein shown and described is constructed to obviateinconveniences by providing for the proper movement of the jawslidehaving thereon the monkeywrench jaw toward its opposite fixed jaw, andwithout lateral vibration, and for the proper movement ofthepipe-wrench-j aw slide toward its fixed jaw, but with the requisitefreedom for lateral vibration, as hereinafter set forth; and,furthermore, said wrench construction is improved and simplified byhaving only one jaw slide made to engage with the swivel-nut, instead ofboth, as heretofore, and so engaging the second jaw-slide with the firstas to cause both to be moved on the bar b by said single engagement withthe nut.

The jaw-slide to, Fig. 1,-has formed on it the monkey-wrench jaw h,which operates in conjunction with the adjoining jaw 6, moved by turningthe nut D, a book, 2, on slide 10, engaging in an annular groove in thenut, as shown. A yoke, t, on slide to, has bar b passing through andclosely fitting within it, so as to prevent any lateral vibration of theslide; and an arm, o, is formed on each side of slide w, near its lowerend, between which two arms bar 12 passes, the said arms extendingbeyond the bar, as shown, and having a pivotpin, 0, therein.

The jaw-slide a, carrying the pipe-wrench jaw, is provided with a yoke,m, fitted loosely around the bar b, and has its lower end pivotallyconnected with the extremities of arms 12 on slide to by the pin 0, andsaid lower end of slide a has a bearingiagainst the adjoining end of nutD at J. Aspring, y, is placed between the end of yoke m and theadjoining inner side of slide w, to throw the jaw end of slide it awayfrom bar b, leaving an opening, 00, be-

tween the dog (1 and the yoke 'i, so that the upper end of slide 91, maybe free to swing more or less toward yoke t'when a pipe which is grippedbetween the dogs d and cl is being turned, in order to cause a speciesof cammovement of dog (1, whereby the engagement of the latter with thepipe is in proportion to the force exerted on the wrench, and it isthereby prevented from slipping. The bearing of the lower end of slideit on the end of nut D prevents the strain of slide it being received bypin 0, and constitutes a firm abutment for said slide.

The modified construction shown in Fig. 2 shows the pipe-wrenchjaw slidehaving the hook engagement 2 with the nut D, instead of themonkey-wrench jaw slide, as in Fig. l; but the slide a, in Fig. 2, isadapted and fitted to vibrate laterally, as is the same slide a in Fig.1, and for the same purpose.

In Fig. 2, the monkeywrench slide is pro vided with two yokes, i and F,closely fitting bar I), and the slide a has an additional yoke, E,surrounding the bar between yoke F and the end of nut D. In thisconstruction it is seen that one slide engaging with the nut carries theother slide by engagement with it, as in the wrench shown in Fig. 1, andalso that in the modified wrench the lower end of the sliden has abearing on the top end of the nut, substantially like that in Fig. 1.

In Fig. 2 the yokes m and E engage under the yokesi and F, to carry jawit toward jaw e, and'when slide a moves down the end of yoke m engageswith the point H, thus making the movements of both slides substantiallysimultaneous on the bar I), as in Fig. 1, when only one slide is inengagement with the nut.

What I claim as my invention is- 1. In combination with a screw-threadedwrench-bar having fixed head projecting at opposite sides thereof, asliding jaw having yokes closely surrounding said bar, an oppositeslidingjaw having an integral yoke loosely encircling said bar andinterposed between the first-mentioned yokes,and a nut on the barswiveled to one only of the sliding jaws, substantially as described.

2. The combination, with a screw-threaded wrench-bar, of a fixed headprojecting at opposite sides thereof, 'a movable jaw having yokesclosely surrounding said bar, a movable jaw opposite the same,having ayoke 1oose- 1y surrounding said bar and interposed between those yokesfirst mentioned, said jaw being also pivoted to its companion slidingjaw, and a nut swiveled'to one only of the sliding jaws, substantiallyas described.

AMOS CALL. Witnesses:

H. A. CHAPIN, CHAs. BILL.

